Flipboard is one of the most popular apps for the iPad. And it was so heavily downloaded when it was released earlier this week for the iPhone that the added traffic brought down Flipboard's servers. Now Google has jumped into this popular space — apps that aggregate your social media content, news, and other web content into a personally tailored, very attractive, magazine-like format. Google Currents (free) is available as a universal app for both the iPhone and iPad.